Статья

Super-tough MXene-functionalized graphene sheets

Tianzhu ZhouBeijing Advanced Innovation Center for Biomedical Engineering, 100191, Beijing, ChinaChao WuSchool of Transportation Science and Engineering, Beihang University, 100191, Beijing, ChinaYanlei WangBeijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, 100190, Beijing, ChinaAntoni P. TomsiaBeijing Advanced Innovation Center for Biomedical Engineering, 100191, Beijing, ChinaMingzhu LiKey Laboratory of Green Printing, Institute of Chemistry Chinese Academy of Sciences, 100191, Beijing, ChinaEduardo SaizCenter for Advanced Structural Ceramics, Department of Materials, Imperial College London, London, SW7 2AZ, UKShaoli FangAlan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX, 75080, USARay H. BaughmanAlan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX, 75080, USALei JiangBeijing Advanced Innovation Center for Biomedical Engineering, 100191, Beijing, ChinaQunfeng ChengBeijing Advanced Innovation Center for Biomedical Engineering, 100191, Beijing, China. [email protected]

2020en

ABI

Аннотация

Flexible reduced graphene oxide (rGO) sheets are being considered for applications in portable electrical devices and flexible energy storage systems. However, the poor mechanical properties and electrical conductivities of rGO sheets are limiting factors for the development of such devices. Here we use MXene (M) nanosheets to functionalize graphene oxide platelets through Ti-O-C covalent bonding to obtain MrGO sheets. A MrGO sheet was crosslinked by a conjugated molecule (1-aminopyrene-disuccinimidyl suberate, AD). The incorporation of MXene nanosheets and AD molecules reduces the voids within the graphene sheet and improves the alignment of graphene platelets, resulting in much higher compactness and high toughness. In situ Raman spectroscopy and molecular dynamics simulations reveal the synergistic interfacial interaction mechanisms of Ti-O-C covalent bonding, sliding of MXene nanosheets, and π-π bridging. Furthermore, a supercapacitor based on our super-tough MXene-functionalized graphene sheets provides a combination of energy and power densities that are high for flexible supercapacitors.

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Идентификаторы

DOI: 10.1038/s41467-020-15991-6

Цитирования и источники

Цитирований: 2Использованных источников: 0

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